Question 274810: If n^3 is 180 greater then n^2 then n is
A 9 b 8 c 7 d 6
Answer by Alan3354(69443)   (Show Source):
You can put this solution on YOUR website! If n^3 is 180 greater then n^2 then n is
A 9 b 8 c 7 d 6
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n^3 = n^2 + 180
n^3 - n^2 = 180
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If there were a lot of choices, using elimination would be good. eg, there are no 7's in 180, so it's excluded.
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Since there are 4 to choose from, try them in order
n = 9: 729 - 81 = 648 way too much
n = 6: 216 - 36 = 180 It's 6
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